Selfishness means always thinking about oneself and one's own interests, without considering or caring about others. It is a behavior where someone puts themselves and their needs first, often at the expense of others. Full definition
you know the power to strike and hurt people... out of selfishness of that person. (gse.harvard.edu)
The wolf in sheep's clothing on this path takes the form of selfishness in the skin of responsibility; ten dollars to the food bank once a month makes us automatically virtuous. (religion-online.org)
It can save me on a daily basis from selfishness, materialism, passing judgment, hatred, vindictiveness, and fear. (rachelheldevans.com)